//: Playground - noun: a place where people can play

import UIKit

var str = "Hello, playground"
let myConstant : Int = 44
let myCount = ["数组","第二个"]
let my = "my cout \(myCount)"
let withLable =  String(describing: myCount)

var optionalName: String? = "John Appleseed"
var greeting = "Hello!"
if  optionalName != nil {
    greeting = "Hello, \(String(describing: optionalName))"
}
let sideLength = optionalName

let name = "jute"
switch name {
case "jute":
    print("jute")
case "juvid":
    print("juvid")
default:
    print("none")
}


